Nortel Circuit Card 311 Reference page 137

Power requirements
Table 65 "OPS analog line card - power requirements" (page 137)
the maximum power consumed by the card from each system power supply.
Table 65
OPS analog line card - power requirements
The +8.5 V dc input is regulated down to +5 V dc for use by the digital logic
circuits. All other power to the card is used by the line interface circuits.
The +8.5 V dc input is regulated down to + 5 V dc for use by the digital logic
circuits. All other power to the card is used by the line interface circuits.
The +8.5 V dc input is regulated down to +5 V dc for use by the digital logic
circuits. All other power to the card is used by the line interface circuits. The
±15.0 V dc inputs to the card are used to power the analog circuits. The +5
V dc from the module power supply is used for the analog hybrid. The
–48.0 V dc input is for the telephone battery. Ringing power for telephones
is 86 Vrms ac at 20 Hz on –48 V dc. The Rsync signal is used to switch
the 20 Hz ringing on and off at the zero cross-over point to lengthen the
life of the switching circuits.
Foreign and surge voltage protection
The NT1R20 OPS analog line card meets UL-1489 and CS03 over-voltage
(power cross) specifications and FCC Part 68 requirements for hazardous
and surge voltage
requirements" (page 137)
card from each system power supply.
Ringer limitations
The OPS line card supports up to three NE-C4A (3 REN) ringers on each
line for either ONS or OPS applications. See
card - ringer limitations" (page
Copyright © 2003-2008, Nortel Networks
.
Voltage
±15.0 V dc
+8.5 V dc
+5.0 V dc
–48.0 V dc
limits.Table 65 "OPS analog line card - power
shows the maximum power consumed by the
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Electrical specifications 137
Tolerance
± 5%
± 2%
± 5%
± 5%
Table 66 "OPS analog line
138).
shows
Current (max.)
150 mA
200 mA
100 mA
350 mA